Having earned financial security for at least another year, Sheppard is now eyeing off a permanent position in Merrick's run-on unit.

Merrick has already hinted at keeping Sheppard even longer.

"It's always nice to start but if Ernie wants me to come off the bench, I'll make sure I do my job and I'll be ready if I do get the call to start," he said.

"I get to focus on the rest of this year now and then look forward to next year as well. I've got loads of great people to learn off."

Sheppard is likely to come off the bench again in Wednesday's derby with a Central Coast Mariners outfit battling health and form.

Skipper Matt Simon will miss the clash after picking up his fifth yellow card last week, while Jake McGing (leg) has joined Tommy Oar (hamstring) in the stands.

While the Mariners are languishing in last place, the seventh-placed Jets are beginning to drift away from the top six.

They are 10 points behind sixth-placed Adelaide United.

"The results so far haven't always gone our way but the performances have been really good. Hopefully it's going to turn for us," Sheppard said.

Stats that matter:* Newcastle have won their past four A-League games against the Mariners, the longest win streak either side of the F3 derby.* Central Coast are winless in their past 17 matches away from home.* Newcastle have made a league-high 238 total shots on goal this season, but have scored the fewest goals this campaign.